Lock-nut.



D. H. LANGAN.

.LOOK NUT.

APPLICATION FILED MAR. 9, 1911.

1,010,503. Patented Dec.5,1911.

- Inventor Witnesses g E Attorneys COLUMBIA PLANOGRAPH CO., WASHINGTON.D, C.

DAVID HEWIT LANGAN, OF GAINES, PENNSYLVANIA.

LOCK-NUT.

Specification of Letters Patent.

Patented Dec. 5, 1911.

Application filed March 9, 1911. Serial No. 613,230.

To all whom it may concern:

Be it known that I, DAVID H. LANGAN, a citizen of the United States,residing at Gaines, in the county of Tioga and State of Pennsylvania,have invented a new and useful LOCl -NUt, of which the following is aspecification.

It is one object of this invention to provide a transversely severedspring nut, the ends of which are adapted to be engaged successively bya tool, to secure a loosening of the nut during the rotation of the nut.

A further object of the invention is to provide a transversely severedspring nut of novel and improved form, and to provide an applying tooltherefor, adapted to secure at once, a rotation of the nut and a radialexpansion of the nut.

In the drawings,Figure 1 is a side elevation showing a fragment of abolt, with the nut of the present invention mounted. thereon; Fig. 2 isan end elevation of a bolt, with the nut applied thereto; Fig. 3 is anend elevation showing the bolt, the nut thereon, and the tool in theoperation of manipulating the nut; Fig. 4 is a detail perspective of thenut; and Fig. 5 is a detail perspective of the tool whereby the nut ismanipulated.

In the drawings, the numeral 1 denotes a portion of the bolt, threadedin the usual manner to receive the nut 2, the latter being internallythreaded as shown at 3, to engage with the bolt 1. The outer face of thenut 2 is circular, as shown at 4, the periphery 5 of the nut being, ofcourse likewise circular. The nut 2 is transversely severed at a singlepoint, by a V shaped notch 6, defining the ends of the nut, the walls 7of the notch 6 converging toward the center of the nut.

The applying tool comprises a head 8 and a radial handle 9. The head 8is provided with a circular bore 10, of slightly larger diameter thanthe external diameter of the nut 2. Projecting radially from the head 8,into the bore 10, is a pointed tooth or projection 11. i

The operation of the structure will be most clearly understood from anexamination of Fig. 3..

In practical operation, the nut 2 is inserted into the bore 10 of thehead 8 of the applying tool, the tooth 11 registering in the notch 6severing the nut 2 at one point. \Vhen the handle 9 is manipulated, thehead 2, by reason of the fact that the diameter of the bore 10 issomewhat larger than the external diameter of the nut 2. This relativerotation between the applying tool and the nut, will permit one of theside faces of the toot-h 11 to bear against one of the end faces 7 ofthe nut 2, as indicated at 12. This engagement at 12 will cause one endof the nut 2. to loosen up slightly with respect to the bolt 1, as shownat 14, the rotation of the nut 2 upon the bolt 1 being a matter carriedforward without difficulty. As soon as the rotation of the applying toolceases, the nut 2, being a spring structure, will embrace the bolt 1tightly, and be held thereon. It is obvious that, no matter in whichdirection the handle 9 is rotated, the nut 2 will be loosened 'upon thebolt 1, one end of the nut or the other, being sprung away from the bolt1, depending upon the direction of rotation of the handle 9.

It will be seen that in the first instance, the head 8 of the applyingtool will have slight rotation upon the nut 2, this slight relativerotation between the nut and the applying tool producing a radialexpansion in the nut 2, whereby the nut will be loosened upon the bolt1.

Owing to the fact that the notch 6 in the nut 2 is V shaped, and owingto the fact that the projection or tooth 10 upon the applying tool is Vshaped, the pressure exerted by the tooth 11 against one end face 7 ofthe nut 2, when the parts are positioned as shown in Fig. 3, will bedistributed evenly over the entire end face 7 which is engaged, as shownat 12, with the tooth 11.

The difference in diameter between the bore 10 of the applying tool andthe nut 2, permits one end of the nut 2 to swing outwardly in thedirection of the arrow A of Fig. 3, under the action of the applyingtool, thus loosening the nut upon the bolt 1, as shown at 14:-

Having thus described the invention, what is claimed is 1. In a deviceof the class described, a spring nut transversely severed to define theends of the nut; and a tool rotatable upon the nut and having aprojection to register between the ends of the nut.

2. In a device of the class described, a spring nut transversely severedto define the ends of the nut; and a toolhaving an opening in which thenut is rotatable, there being 8 will have a slight rotation upon the nuta projection upon the tool, adapted to register between the ends of thenut, the diameter of the opening being greater than the diameter of thenut, to provide for a springing of the nut under the engagement betweenthe projection and one end of the nut.

8. In a device of the class described, a circular nut transverselysevered to define the ends of the nut; and a tool having a circularopening to receive the nut, there being a projection upon the tool,adapted to register between the ends of the nut.

4. In a device of the class described, a nut and a tool to inclose thenut, the nut and the tool having relative rotatory movment; the nutbeing transversely severed to define the ends of the nut, and the toolhaving a pro jection to register between the ends of the nut.

5. In a device of the class described, a nut and a tool to inclose thenut, the tool having rotatory movement with respect to the nut, and thenut having radial expansion within the tool; the nut being transverselysevered to define the ends of the nut, and the tool 2 having aprojection adapted to register between the ends of the nut to secureradial expansion of the nut when the tool is rotated upon the nut.

6. A spring nut transversely severed to 3 define the ends of the nut,and a tool adapted to engage between the ends of the nut to secure botha rotation of the nut and a radial expansion of the nut.

In testimony that I claim the foregoing as 3 my own, I have heretoaffixed my signature in the presence of two witnesses.

DAVID HEWIT LANGAN.

WVitnesses:

F. E. REINWALD, J. D. BARNI-IART.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

